基于PLC的绕组线圈真空干燥系统的设计

Design of Winding Coil Vacuum Drying System Based on PLC

目前厂家对浸漆绕组线圈的干燥主要使用传统热风循环的方法,而且关于浸漆绕组线圈的干燥工艺研究尚不充分;针对传统绕组浸漆线圈干燥时间长,干燥所得线圈表面绝缘性能欠佳等问题,设计研发了一套自动化程度较高的绕组浸漆线圈真空干燥系统;该系统主要由真空单元、温度控制单元、电气控制单元、人机交互单元等部分组成;通过将浸漆线圈放置于真空环境中,对浸漆线圈进行通电的方式来加热干燥,以可编程逻辑控制器为核心,利用PLC的PWM输出功能控制加热,同时提出了浸漆线圈干燥的均匀设计实验方案,得出了最佳实验干燥工艺,最后通过对实验数据的回归分析得出了各实验指标之间的关系及显著性影响;实验结果表明:该系统不仅缩短了浸漆线圈的干燥时间,而且使浸漆线圈表面的绝缘性能有了明显的提高。

At present,many manufacturers mainly use the traditional method of hot air circulation to heat the winding coil,and the study of drying process of the winding coil is not enough.Aiming at the problem that the traditional winding dip coating coil has a long drying time and poor insulation performance of the coil,a high degree of automation is designed and developed.The system is mainly composed of vacuum unit,temperature control unit,electric control unit,man-machine interactive unit and so on.The dipping coil placed in a vacuum environment,the impregnating coil is energized to heating and drying,using the programmable logic controller as the core,using the PWM output function of PLC control heating,and put forward the lacquer dry coil uniform experimental design,the optimum experimental drying process,finally through regression the analysis of experimental data obtained the relationship between each experimental index and significant.The experimental results show that the system can not only shorten the drying time,but also improve the insulation performance of the coil.